Rust Programming By Example

Encoding data bytes

Let's now see how to encode data; it's even simpler:

impl Encoder for BytesCodec {
    type Item = Vec<u8>;
    type Error = io::Error;

    fn encode(&mut self, data: Vec<u8>, buf: &mut BytesMut) -> io::Result<()> {
        buf.extend(data);
        Ok(())
    }
}

We just extend the buffer with the data.